*{
    margin: 0;
    padding: 0;
    font-size: 12px;
}
.clearfix::before,
.clearfix::after{
    content: "";
    display: table;
    clear: both;
}
body{
    background-color: #2286C6;
}
.father{
    width: 780px;
    margin: 0 auto;
}
li{
    list-style: none;
}
a:hover{
    position: relative;
    top: -1px;
    right: -1px;
}
a{
    text-decoration: none;
}